@misc{indiciae81f3cf1d78bb,
  title = {Geologic map of western Whatcom County, Washington},
  author = {D. J. Easterbrook},
  year = {1976},
  doi = {10.3133/i854b},
  url = {https://pubs.usgs.gov/publication/i854B},
  note = {Source identifier: i854B}
}